Brake apparatus.



D. L. LINDOUIST D. C. LAHSONr BRAKE APPARATUS.

Afrucmowmzo luLv 1, 19H.

Patented D90. 4,1917;

WITNESSES UNITED STATES PATENT oEEfIoE;

DAVID L. LINDQUIST AND DAVID c. LARsoN, or YoNxEns, NEW Yorin, Assmzmnwsuioy o'rIs ELEvA'ron CQMPANY, or JERSEY CITY, NEW JERSEY, A CORPORATION oF NEW .musei 'Application mainly 7, 1914. seria1N0.s4s,'44a,

with thisrod to applythefbrakeshoes1'11, 11 to the bra-ke pnlleyl, `the'pressure "of the T0 all 'whom it may concern.'

Be it known that we, Davn) L. LINDQUls'r, a subject of the Kingof Sweden, and DAVID (l. LansoN, a citizen of the United IStates, residing in Yonkers, in thecounty of West-V chester and State of New York, have invented a new and useful Improvementin Brake Apparatus. of which the following is a specification.

()ur invention relates to brake apparatus, and more particularly to alternat-in current electric brakes such as are used wit electric, elevators.

One of the objects of the invention is the provision of an alternating current brake apparatus embodyingv improved details of construction and,V arran ement of arts in l general, and whereinV idingl friction surfaces are eliminated from themovable parts of'th'e electromsignet.V l 1 Another object vof t'heinvention isvthe provision of improved fluid `retarding means -for the magnet armatures, the vsame being arranged and `constructed in such `a manner as to eliminate the use of stuffing` boxes, packed joints, etc., such as are now commonly used, but which practice forms a source of trouble on account of objectionable leakage.

Other objects of the inventionv Will appear more Jully hereinafter,v the-novel combinj` tion `oi' elements and arrangementsof parts being pointed out inthe appendedclaims;

, Referring to the drawings, Figure 1 rep,

resents in elevation, an electromagnetic brake constructed in `accordance without' inventio-nf, `and with `certain parts lshown A11n section; Fig. 2 shows an end view of Fig. 1,

-1' with certain parts` shown in section.

l `Lilie characters of reference represent cor. responding parts in both figures.

In detail Athe mechanism'shown in Figs.` 1 and. 2 comjirises a casing or pot 1, which -is` .i formed ,-inicgral-l-y with the standard 2. 'l'he'H standard `|s secured to` a sullable,base.or hed plato 3 h y rrlcansof. bolts 4.-

brake pulley 5 is `li; i.d|y mouiltednpon a y,dnl ft ('r. i liralre'shoe levers 7, 7" are pivotill'ly mounted :It 8,-;8, riispoctively on the slalidnrd The londo)` ends ol lhese lil-ahw shoe levers are conne(n l Locri-.ther hy a rod 9. Spi-'ings 10, 10', ari) 'Ised in conjunction BRAKE APPARATUS.

Patented Dee. 4, 1917.

springs' being regulated 4hymea-"ns of' ladjusting nuts-`12, 1 2".Y i

The parts thus"fardescribed-lure of n wellknown'- type and `havebeendescribed only brieiy. Coming-now to theiparticularf improvements which forml-fthe Ysiibjectmatter of Athepresellt i11\"ei1tion,=the salnefwill be' described more inl dct'iil.l 'Onefof-tlieimprovementsfhas to -do with theelectrwmngnet A, and more 'particularly :the movable parts thereof which are constructell andarranged in such a manner as to eliminate Sliding f1iction, etc., 'which featurethereof'greatly in'- creases the eilicicncy of the `magnet anillo-'ef luces wear-,ascompafred with the; alternating current brake magnet'sfnow in' common use wherein the armatures or -cores are-'of the reciprocating' lorp]ungerytype.` i ent instance thef'clcc' ommen tained within' thecaSingfL-wh l Y with', a hingedcover 13, L"vain-lia suitable fastener thereforsueltas 14; "lfhe"clectroanag nctnin'deta'il comprises-laspooll which iS adapted. toy rorcive'the -wii'idifi'lgs 'lhe s lool is suspended by 'suita'ble-.brackets20, w ich are fixed to the depending'menil'icr 1%) 'lm-med lateral projections -oiitlie1v serie-sofilaminatedplal These 'plntesfaie const irte si the forni of the lelit'eliwlf l jccting portions rfori'ning :innigm-,tic poles.`

lncnt betweentheliralie,levers audiihe :t'rmu` ,lures may Le made h v means of the adjust- V .54, ln'fhichform 'unf fintegral v`part of they plaie-16; fvlolited tothearranged to force liquid through a restricted passage, to govern the Yfriction applymg means.

4. In alternating current brake apparatus,

the combination with a brake pulley, means for applying friction to the brake pulley, means comprising an electromagnet having co-acting laminated armatures which are fulcrumed on a common pvot, for effecting the release'of the friction appLving means,

and :fluid actuating mechanism operatively associated `with the armatures and arranged to forceV fluid through a restricted passage, to govern the friction applying means.

5. In alternating current brake ap parato-s,

the combination with a brake pulley, means ior applying friction to the rake pulley,

means comprising an electromagnet having eo-acting armatures which are-tulcrumed on a common pivot for elfecting the release of the friction applying means, and a piston operatively connected to each armature, said pistons being arranged to force {iuid through a restricted passage common to both of the said armatures, to govern the friction applying means. i

6. In alternating current brake apparatus, the combination with a brake pulley, means ior applying friction to the brake pulley, electromagnetic means for effecting the release of said friction applying means, said means comprising an electromagnet having co-acting dependent armatures, a piston operatively connected to each one of the said armatures, a receptacle for the pistons, and means for supplyingiiuid between the said pistons.

7. In alterna ting current brake apparatus, the combination with a brake pulley, means for applying friction. tothe brake pulley, means for eifeeting the release of said friction applying means1 the latter comprising an electromagiietlynd armature therefor arranged on a common pivot, and fluid actuat ing retarding means for the armatures, said means comprising a piston operatively counected to each one of the said armatures, a

receptacle for thepistons, and a restricted- Huid passage in said receptacle.

8. In alternating currentbrakeapparatus,

nl brake levers pivoted at an intermec iate point and adapted to engage said pulley, springs connected to said levers at one end ilu-roof, and an alternating current electromnguit having laminated armatures pivoted togethendirectly on a common p'ivot to withdraw the brake levers from in frictional en"- gagment with the brake pulley and operativel y connected to the other ends ol? said brake levers. l v

10. In alternating current brake appa ratus, the combination with abrake pulley,

a pair of pivoted brake levers having inde pendent pivots, 'a spring adapted normally to hold the levers in trictional engagement with the brake pulley, an electromagnetz armatures therefor mounted directly on a common pivot, and a connection between the .said arlnaturrs and the brake levers.

11. In alternating current brake `appar ratus,v the combination \l'ith n brake pulley,

a pair ot pivoted brake levers having inde` pendent pivots, and adapted to engage sald pulley, springs connected to said leversat,I

said pulley.

12. In alternating current brake apparatus, the combination with u brake pulley, a pair of pivoted brake levers adapted to engage said pulley, springs arranged normally to hold the levers in frietional engagement with the brake pulley, and means for effecting the release of the said levers, said means comprising an alternating `current electromagnet, coacting armatures therefor arranged `on a common pivot, and an adj ustable connection between the said armatures and the said brake levers.

18. In an electric brake, the combination with a brake pulley, ay pair of pivoted brake lere-rs, a spring arranged at one end thereof for normally holding the levers in rictional engagement with the brake pulley, andan electro-magnet having co-acting armatures arranged on a common pivot, said armatures being operatively connected through an ad justable connection to theother ends of the said brake levers.

14. In an electric brake, thecombination with a brake pulley, a pair of vpivoted brake levers, springs connected to `one end of said levers to apply brake-levers to the Y brake pulley, an alternating current magnet having enacting laminated armaturesarranged ona common pivot .and adjustably connected to the other ends of thesaid brake levers to withdraw the brake levers from in engagement with the brake pulley, anda piston ope 'atively connected with each armature, said pistons being adapted to force -iuid thror 'glia restricted passage common tofboth of the said pistons when attracted by the said magnet, to governfthe brake applying means. 1

15. In" an electro-responsive brake appa.-

lao

ratus, the combination of a brake pulley, a brake standard having a casing containing fluid forming an integral art thereof, a pair ofgbrake levers plvotal y connected to the said standard, a pair of springs connected to'one end of said 1evers, an electromagnet contained in thecasing and having coactin'g laminated armatures arranged on a common pivot, andoperatively connected to the other endof the said brakelevers, and Huid actuating means for retarding the movementof the Core.

' 16. In an e1ectro-responsive device, the combination with an e1ectromagnet, co-acting .armatures therefor arranged on a common pivot, a casing containing iuid `surrounding the said armature, an meanslfor .retarding the movement of the said armatures, said means comprising pistons arranged to force'uid through a restricted passage when the said armatures are attracted by the magnet.

17. In an electro-responslve device, the combination with an electromagnet, a 1aminate'd movable armature therefor, a casing containing fluid 'surrounding the said magnet and armature, and means associated with the fluid for retarding the Amovement of the said armature, said means comprising a piston operatively connected to the core land adapted to force uid through a restricted passage Whenthe said armature is attracted.

18.l In an electro-responsive device, the combination with an electroma et, co-act ing dependent armatures there or arranged on a common pivot2 a casing containing uid surrounding the-said magnet and armatures', and iiuid actuating means for retarding the movement of the armatures, said means com- .prisingl a piston operatively .connected to each one of thesaid armatures and adapted to force fluid through a restricted passage i common to both of the said pistons.

In testimony whereof, We have signed our names to this specification in the presence of two subscribing Witnesses.

DAVID L. LIN DQUIST.

DAVID C. LARSON.

Witnesses: `WALTER C. STRANG ARTHUR TREzIsE, 

